---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Sat 02/03/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:15 PM - Re: Radio interference (jetboy) ________________________________ Message 1 _____________________________________ Time: 03:15:14 PM PST US Subject: JabiruEngine-List: Re: Radio interference From: "jetboy" Updated the plots at http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/ I also did bench testing; adding an R type plug and distributor spark gap to the setup to more closely represent the situation on a flying engine. I could only observe the noise with the R plug on an older analyser (no plots available), however the noise reduction was a significant improvement over the normal plug and inductive lead combination (-5 dB). The pulse observed at the coil output lead was not significantly higher when using a R plug; but it was higher with increased plug gap settings. I now have no concerns about R plugs affecting coil reliability provided the specified gap is maintained. NGK DR9EIX is probably the best option. If the inductive suppression lead is only available with low resistance (less than 1 K) then fitting R plugs would seem a good option. Ralph -------- Ralph - CH701 / 2200a Read this topic online here: http://forums.matronics.com/viewtopic.php?p=92699#92699 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.